e299a7c9b737311ab10148b46f15d5d8654d0c9cd7fed22521e01eea857682ca

Analysis

max time kernel
142s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
19-02-2024 16:52

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General

Target

2024-02-19_ed5ff5855a2b40f9cc5b9e1081fa5469_cryptolocker.exe
Size

68KB
MD5

ed5ff5855a2b40f9cc5b9e1081fa5469
SHA1

38b1a6c983539c62f1e1e7c650a9c9f84528e991
SHA256

e299a7c9b737311ab10148b46f15d5d8654d0c9cd7fed22521e01eea857682ca
SHA512

a1852d63380bad7f55d8c8d0bfe80b40b1f01ad5a5c847ffa7ec46cb09f32c069b162b55d0da6a33393934f6dba2f9fc63fbdb19cfd04ab680220538d1d2589a
SSDEEP

1536:Dk/xY0sllyGQMOtEvwDpjwycDtKkQZQRKb61vSbgZ3QzNKUI:DW60sllyWOtEvwDpjwF85C

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/4004-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023213-13.dat	CryptoLocker_rule2
behavioral2/memory/4004-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/4004-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023213-13.dat	CryptoLocker_set1
behavioral2/memory/4004-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\Control Panel\International\Geo\Nation	2024-02-19_ed5ff5855a2b40f9cc5b9e1081fa5469_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3856	asih.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4004 wrote to memory of 3856	4004	2024-02-19_ed5ff5855a2b40f9cc5b9e1081fa5469_cryptolocker.exe	84
PID 4004 wrote to memory of 3856	4004	2024-02-19_ed5ff5855a2b40f9cc5b9e1081fa5469_cryptolocker.exe	84
PID 4004 wrote to memory of 3856	4004	2024-02-19_ed5ff5855a2b40f9cc5b9e1081fa5469_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-19_ed5ff5855a2b40f9cc5b9e1081fa5469_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-19_ed5ff5855a2b40f9cc5b9e1081fa5469_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4004
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3856

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
68KB

MD5
d1fe6c276143f03ee52ccb59dd5352a1

SHA1
f14812cfe0f896c5e031e298150a1458e9d8391d

SHA256
b9007cd907f8e6c34e6d90d447faa87d15e20d9e6b8031955056b545cb452c9e

SHA512
1ea0a1dfaaae77e6f0285e81b54649b82de32083e48450830861b8a6fb977fb028d8249aeb747b71d2eaf2449867920aba1bacf6ebd68d75182794d99f101ab4

Download Submit
memory/3856-20-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/3856-19-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/4004-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/4004-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4004-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4004-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4004-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download